Lester m



(No Model.)

L. M. RICH.

- PUMP.

No. 539,644. Patented May 21, 1895.

* .1 5 f a mhw m zfi g NITED STATES PATENT OF ICE.

LESTER M. RICH, OF CEDAR RAPIDS, IOWA.

PUMP.

SPECIFICATION forming part of Letters Patent No. 539,644, dated May 21,1895.

Application filed February 11, 1895. Serial No. 533,011. (No model.)

To all whom, it may concern.-

Be it known that I, LESTER M. RICH, a citizen of the United States,residing at Cedar Rapids, in the county of Linn and State of Iowa, haveinvented certain new and useful Improvements in Pumps, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

This invention relates to improvements in that class of pumps in whichthe piston works in a brass tnbeor cylinder secured in the bore of awooden pump stock; and it has for its object to provide means forsecurely holding this cylinder in place, and to prevent it Working loosewhen the pump stock expands or swells when wet.

The invention consists in so constructing the pump stocks that theswelling of the wood will serve to hold the cylinder firmly in its placeinstead of enlarging the bore of the stock and permitting it to workloose as is the case of the pumps of the ordinary construction.

In the drawings, Figure 1 is a side elevation of the lower end of apump-stock. Fig. 2 is a vertical sectional view thereof.

Referring to the various parts by numerals, l designates the lower endof a wooden pumpstock which is bored vertically in the usual manner.Around the lower end of the stock is placed a metal ring 2 whichprevents the lower end of the stock splitting. In the bore of the stocka metal cylinder 3 is driven. This cylinder fits tightly within the boreof the stock and its lower end is expanded and forced into thesurrounding wood, an annular approximately V-shaped enlargement 4 beingformed on said lower end. This enlargement may be formed at the upperend of the tube, and it may be of any suitable form.

Surrounding the stock at a point opposite the enlargement 4 of the tube3 is a strong metal ring or band 5 which is of a sufficient width toextend for ashort distance above and below the enlargement 4 of the tubewhen in position. This band 5 is placed over the lower end of the stockand is driven up until it binds tightly around it at a point oppositethe enlargement 4 of the tube.

If desired a screw, or nail, or indentation in the band may be used tosecure it against displacement, but

it is proposed to have it bind so tightly around the stock that thiswill be unnecessary.- The object of the band 5 is to prevent the wood ofthe stock expanding at this point when it becomes wet and therebyprevent the tube working loose in the stock.

Heretofore in this class of pumps, the tubes 3 have been expanded ateither or both ends to hold them in position, but this has been foundinsufficient. When the stock becomes wet and expands, the bore of thestock onlarges and the tube soon works loose; but, by means of my strongmetal band 5 the wood of the stock is held against expansion at thepoint of enlargement 4 of the tube, and the tube is therebypreventedfrom working loose.

If there is any swelling of the wood when it becomes wet at this point,it will tend to close the bore of the stock and will bind on the lowerend of the tube and more securely hold it in position.

It will thus be seen that I provide a very simple device which willsecurely hold the cylinder of this class of pumps in position, and whichwill cause the expansion of the wood stock to operate to hold thecylinder in position instead of causing the bore of the stock to enlargeand permitting the tube to work loose therein.

Having thus fully described my invention, what I claim is- A pumpconsisting of a wooden stock, a cylinder in the bore thereof, saidcylinder being expanded at its lower end, a band driven on the stock andfitting tightly around it at. a point coincident with the expanded lowerend of the tube whereby the swelling of the wood will hold the cylinderin place, and a band surrounding the lower end of the'pump stock,substantially as described.

In testimony whereof I affix my signaturein presence of two witnesses.

. LESTER M. RICH.

Witnesses: 1

GEO. W. EAKLE J. F. RALL.

